The yellow demarcation bar marking indicates

• A. A runway with a displaced threshold that precedes the runway
• B. A taxiway boundary
• C. A no-entry zone
• D. A runway end collision zone

Answer: (A)

The yellow demarcation bar marks the boundary of a displaced threshold. It shows that the pavement before the bar is not used for touchdown, even though it may be used for takeoff or taxiing. Landing must occur beyond this bar at the actual runway threshold. This marking isn’t conveying a taxiway boundary, no-entry zone, or a runway-end collision zone; it specifically signals that a portion of the pavement precedes the usable landing distance due to the displaced threshold.